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Question: There are four red cards and four blue cards. The host takes either of them first, add any two cards (two cards on each person's head) to the forehead of A, B, and C respectively) The three people A, B, and C can see the cards on the foreheads of the other two. After reading the cards, let them guess what color of cards are on their foreheads,A says no, B says no, C says no, and then a says yes.Ask how to make a decision and how a knows it. How can I implement it with a program? Idea:

Source: Saidi net Author: alizze Associations are frequently used in Oracle Data Queries. Flexible application associations can solve many practical problems. The following are some examples: Create a table create table ab ( ab_id number(5), ab_name varchar2(30) ); create table bb (

string to assign C to current_prefix. In this case, the loop ends, and the next prefix will be added, and its index will be output. For example. Assume that our code stream is bbbcbba and the character set is {a, B, c}. We agree that the arrangement is in ASCII ascending order.The initialized string_table is as follows:-----------------------Index string00 'A'01 'B'02 'C'-----------------------These three items are called root items.Then start encoding: During the simple process, I will only li

") print ( R.get ("name")) #输出: Zhangsanlisi3.2Hash operationThe hash in Redis is similar to a name in memory that corresponds to a dic to storeHset (name, key, value)#name对应的hash中设置一个键值对 (does not exist, it is created, otherwise, modified) R.hset ("Dic_name", "A1", "AA")Hget (Name,key)R.hset ("Dic_name", "A1", "AA") #在name对应的hash中根据key获取valueprint (R.hget ("Dic_name", "A1")) #输出: AAHgetall (name)#获取name对应hash的所有键值print (R.hgetall ("Dic_name"))Hmset (name, mapping)#在name对应的hash中批量设置键值对, Mappi

Since the CentOS system has been installed before, can operate or configure the server, but sometimes because the server in the computer room or other places, we need to connect the past through the remote way, then we use Putty to connect the Linux service, and do some simple settings:The private key and the public key are paired, there will be private key encryption, public key decryption, the private key is stored locally, the public key is stored on the server, when the local connection to t

Fairy Four came out, The hateful incredibly someone ... Delete method: 1,ie Tool-Manage Add-ins, put Popblock ... (presumably this name) that is disabled 2, close all IE windows 3, start-run-regedit, find Wmvploc, remove the parent of the key value (that is, many alphanumeric items) Delete (the novice is not sure to use caution!) there are two places where the system crashes. 4, delete the Wmvploc.dll under the System folder such as CD-Free patches ... Attached emule Download Address: ed2k:

= = 1 el.tagName.toLowerCase () = = Ptagname.tolowercase ())//Gecko bug, supposed to be Uppe Rcase Return el; Else Return GetParent (El.parentnode, ptagname); } function Ts_sort_date (a,b) { Y2K Notes:two digit years less than are treated as 20XX, greater than m are treated as 19XX AA = Ts_getinnertext (A.cells[sort_column_index]); bb = Ts_getinnertext (B.cells[sort_column_index]); if (aa.length = = 10) { DT1 = Aa.substr (6,4) +aa.substr (

; Else Return GetParent (El.parentnode, ptagname); } function Ts_sort_date (a,b) { Y2K Notes:two digit years less than are treated as 20XX, greater than m are treated as 19XX AA = Ts_getinnertext (A.cells[sort_column_index]); bb = Ts_getinnertext (B.cells[sort_column_index]); if (aa.length = = 10) { DT1 = Aa.substr (6,4) +aa.substr (3,2) +aa.substr (0,2); } else { Yr = Aa.substr (6,2); if (parseint (YR) DT1 = Yr+aa.substr (3,2) +aa.substr

Problem Description: Suppose there are 3 sealed boxes on the table, a box with 2 silver coins (a silver coin = 10 pence), a box with two nickels (one nickel = 5 pence), and a coin in a box with a nickel. These boxes are labeled 10 pence, 15 pence, and 20 pence respectively, and are known to be wrong. Allows you to remove a coin from these boxes, is there any way you can say what's in the box? Problem Analysis: Assume: A--Silver coin, 10 (Penny) b--nickel, 5 (pence) So: AA--20 (pence), AB--15 (pe

string such as: D:/fqf.txt*/Public void movefile (string oldpath, string newpath){Copyfile (oldpath, newpath );Delfile (oldpath );}/*** Move a file to a specified directory* @ Param oldpath string such as: C:/fqf.txt* @ Param newpath string such as: D:/fqf.txt*/Public void movefolder (string oldpath, string newpath){Copyfolder (oldpath, newpath );Delfolder (oldpath );}Public static void main (string ARGs []){String AA, BB;Boolean exitnow = false;Syst

Often a friend asks a question like this, The data in the table is as follows ID AA BB 1 123 456 1 4535 54 1 60 6564 1 60 656 2 50 664 2 60 6 3 89 89 4 40 4242 The hope is that the result will be ID AA BB 1 123 456 2 50 664 3 89 89 4 40 4242 Of course, the environment is SQL Server The answers and analysis are as follows: 1, many friends want to use distinct to solve the problem, but it is impossible, Disct

If php5.4 is used for reference, an error is returned. if php5.4 is used for reference, an error is returned. If php5.4 is used for reference, an error is reported. if php5.4 is used for reference, an error is reported. if php5.4 is used for reference, an error is returned. For your reference, refer to the following for details: Error analysis when using php5.4 in the php5.3 series, and error when using php5.4. This example analyzes the error message returned when php5.4 is referenced. We will

Is the object ajaxpost in js directly converted to an array in php? This post was last edited by zhoumengkang at 10:03:14 Jquery was introduced in advance. var str ="{'a':'b','aa':'bb'}";var str2 = eval('('+str+')');var type = typeof(str2);console.log(str);console.log(type);//objectconsole.log(str2);$.post('./bb.php',{'data':str2}); Bb. php code $data = $_POST['data'];var_dump($data); The returned res

I want to put keywords in the software search function, such as "apple", I want to get Baidu search Apple link: http://www.baidu.com/baidu? WD = % C6 % BB % B9 % FB Q = 3 How can this link be generated? If not, what search engine can easily achieve such a search link: http://www.baidu.com/baidu? WD = "apple "??? Search "apple ":Baidu: http://www.baidu.com/baidu? WD = % C6 % BB % B9 % FB Q = 3QQ. Soso: ht

This article mainly introduces the problem of errors reported by reference in php5.4, and analyzes the problem and solution of errors reported by reference in php5.4 based on the instance form, which has some reference value, if you need it, you can refer to the example in this article to analyze the error message returned when you reference php5.4. We will share this with you for your reference. The details are as follows: There is no problem in transferring references from php5.3 series and e

php5.4 quoted times wrong problem analysis, php5.4 quoted times wrong In this paper, the author analyzes the php5.4 of quoted times. Share to everyone for your reference, as follows: php5.3 Series version and previous version, reference no problem, after upgrading to php5.4, the place of reference, full error Fatal error:call-time pass-by-reference have been removed in F:\work\wamp\www\test\test.php on line 6. take a look at the following example. Example 1, recursive reference, PHP 5.3 and ver

[Description] Given a tree with N nodes, calculate the maximum distance between each node and other nodes.[Input format]The first line of the input is a natural number N (N Line I contains two natural numbers, indicating the node number connected to the node numbered I and the length of the network cable ..The total length cannot exceed 10 ^ 9. Two numbers in each line are separated by spaces.[Output format]The output contains N rows. line I indicates the Si distance between the node that is far

1. String Conversions to arraysSplit ();Console.log ("AABBCC". Split (")"); Print: ["A", "a", "B", "B", "C", "C"]2. Array conversion to stringJoin ();Console.log ([' AA ', ' BB ', ' VV '].join (")"); Print: AABBVV3. Finding elements in an arrayIndexOf (); Used to find whether an element is in an array, returns an index of an array if it exists, or returns-1;["AA", ' BB '].indexof ('

1. Command functionRM: Delete a directory or file2. Command formatRM [Options] Directory or file3. Command parameters-I: Interactive delete-R: Recursive Delete, delete directory-F: Force delete-V: Show more information4. Command instancesExample 1: Interactive Delete[Email protected] ~]# Rm-ir ABCRm:remove directory ' abc '? Yes[[email protected] ~]# lsAnaconda-ks.cfg Desktop file1 file2 gg install.log install.log.syslogExample 2: Delete directory, recursive delete[Email protected] ~]# MKDIR-PV

There are 4 red cards and 4 blue cards, the moderator first take any two, and then in a, B, C three people put any two cards on their foreheads, A, B, c three people can see the other two people's hands on the forehead, after reading let them guess what color on their forehead card, A said don't know, B said don't know, C said don't know, then a said to know. For advice on how to reason, A is how to know. If you use the program, how to achieve it. Idea: The purpose is to derive a color, beca